BMW modernizes leipzig with industrial terahertz technology

  • Author: Inspenet TV.

  • Publish date: 11 May 2026

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BMW Group continues to strengthen the technological transformation of its manufacturing processes with the incorporation of a terahertz-based measurement system at its Leipzig plant, Germany. The solution allows for the inspection of paint layer thickness on plastic components without damaging the parts and directly within series production.

The company currently uses this technology on exterior components such as bumpers, side skirts, and spoilers manufactured by injection molding. The implementation represents a new advance for industrial digitalization within the European automotive industry.

BMW replaces manual inspections with automated measurement

Until now, paint thickness inspections on plastic parts required manual processes that included cutting with scalpels and analysis using microscopes. In addition to destroying components, this method generated waste and slowed down the detection of possible production deviations.

With the new solution, BMW fully automates this procedure using sensors integrated into industrial robots. The equipment is positioned in front of each component and uses terahertz waves to analyze the thickness of the different paint layers in a matter of seconds.

The technology achieves micrometric precision and generates reproducible measurements in real time, facilitating more efficient monitoring within the production line.

Terahertz sensors improve quality control

The system used by BMW is called “Irys” and was developed by the technology company das-Nano for industrial inline applications. Its main capability is to perform measurements without physical contact and without altering the integrity of the inspected parts.

Thanks to this integration, the Leipzig plant can detect manufacturing deviations early and correct parameters before errors affect a larger number of components.

Furthermore, the digitalization of the data obtained increases process traceability and strengthens quality control in automotive production.

Leipzig plant accelerates its digital transformation

The incorporation of terahertz sensors is part of a broader industrial digitalization strategy within BMW. In 2024, the plant had already begun to use automated systems for surface inspection and is now moving towards a fully digital paint operation.

All data collected by the system is stored digitally and can later be used in AI-based analyses. The goal is to identify trends, optimize manufacturing parameters, and anticipate potential operational failures.

BMW believes that this combination of automation, data analysis, and advanced measurement will increase operational efficiency and reduce material waste in its production processes.

BMW sets a precedent in the automotive industry

The Leipzig plant became the first BMW Group facility to use this technology in internal production. Furthermore, the company states that it is also the first application of terahertz-based measurement to inspect paint on plastic components within the sector.

After completing pilot tests, BMW confirmed that the solution can now operate with all parts transport systems and continues to expand its compatibility with different color variants.

The company also considers it viable to extend this technology to other paint shops within the group and to part of its global supplier network.

Plastic production gains strategic relevance

The Exterior Plastics division in Leipzig has approximately 450 employees specializing in the manufacture of parts for various models of the German manufacturer. From this plant, components are supplied not only to Leipzig but also to other BMW facilities in Dingolfing and Regensburg.

With this implementation, BMW reinforces its commitment to more precise, connected, and data-driven industrial processes within the automotive industry.

BMW uses terahertz sensors to measure paint on plastic components at the Leipzig plant.
BMW's automated system inspects paint thickness on plastic parts using terahertz-based technology. Source: BMW Group.

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